1 / 4

1.6 Machine Languages, Assembly Languages, and High-level Languages

1.6 Machine Languages, Assembly Languages, and High-level Languages. Three types of programming languages Machine languages Strings of numbers giving machine specific instructions Example: +1300042774 +1400593419 +1200274027 Assembly languages

duff
Download Presentation

1.6 Machine Languages, Assembly Languages, and High-level Languages

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 1.6 Machine Languages, Assembly Languages, and High-level Languages • Three types of programming languages • Machine languages • Strings of numbers giving machine specific instructions • Example: +1300042774 +1400593419 +1200274027 • Assembly languages • English-like abbreviations representing elementary computer operations (translated via assemblers) • Example: LOAD BASEPAY ADD OVERPAY STORE GROSSPAY

  2. 1.6 Machine Languages, Assembly Languages, and High-level Languages • High-level languages • Codes similar to everyday English • Use mathematical notations (translated via compilers) • Example: grossPay = basePay + overTimePay

  3. 1.7 History of C • C • Evolved by Ritchie from two previous programming languages, BCPL and B • Used to develop UNIX • Used to write modern operating systems • Hardware independent (portable) • By late 1970's C had evolved to "Traditional C" • Standardization • Many slight variations of C existed, and were incompatible • Committee formed to create a "unambiguous, machine-independent" definition • Standard created in 1989, updated in 1999

  4. 1.9 The Key Software Trend: Object Technology • Objects • Reusable software components that model items in the real world • Meaningful software units • Date objects, time objects, paycheck objects, invoice objects, audio objects, video objects, file objects, record objects, etc. • Any noun can be represented as an object • Very reusable • More understandable, better organized, and easier to maintain than procedural programming • Favor modularity

More Related